Things have been relatively quiet over at T-Mobile over the last several months. However, the mobile carrier is planning on launching a new prepaid service offering in February called GoSmart. T-Mobile has been trialing the service since December and has said that in its test markets it has seen strong demand.

The prepaid wireless service will be offered in three different plans. A plan at $30 per month will offer unlimited voice minutes and texting. At $35, users will get unlimited voice minutes, unlimited texting, and 2G internet service. Users who pay $45 per month will get unlimited voice/text, and capped high-speed internet service.

The $45 high-speed plan has a 5 GB data cap before users are switched to slower 2G speeds. It seems that the $35 plan that includes 2G internet service doesn't have a cap. One thing to keep in mind, however, is that standard T-Mobile customers will be given priority over GoSmart customers when the network is experiencing heavy traffic.

GoSmart has two different hardware offerings on its website including a $49 Alcatel OT 838 and a mobile SIM kit priced at eight dollars. That SIM kit is intended to allow users to use their own unlocked GSM phone.

If you're going there, just set a per-unit data cost and consider voice and text just part of the datastream. There might also need to be a small base service cost to account for the overhead of just having service at all.

However, that's too logical; most people appear to prefer to pay a set amount, even if it's more than they'd pay a la carte.